Purge of "kernel-package" doesn’t delete all components

[Musbach]

I am on Ubuntu 16.04 with Kernel 4.4.0-59-generic. "sudo aptitude install kernel-package" installs 56 packages.
"sudo aptitude purge kernel-package" removes only 44 packages. One has to remove the remains by hand: "sudo aptitude purge libkpathsea6 fonts-lmodern libpotrace0 libptexenc1 libsynctex1 libtexlua52 libtexluajit2 libzzip-0-13 lmodern tex-common texlive-base texlive-binaries".

The 12 packages are very large and I don't know if they are really necessary.

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: kernel-package (not installed)
ProcVersionSignature: Ubuntu 4.4.0-59.80-generic 4.4.35
Uname: Linux 4.4.0-59-generic i686
ApportVersion: 2.20.1-0ubuntu2.4
Architecture: i386
Date: Sat Jan 21 13:09:18 2017
InstallationDate: Installed on 2016-10-09 (103 days ago)
InstallationMedia: Kubuntu 16.04 LTS "Xenial Xerus" - Release i386 (20160420.1)
ProcEnviron:
 TERM=xterm
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=de_DE.UTF-8
 SHELL=/bin/bash
SourcePackage: kernel-package
UpgradeStatus: No upgrade log present (probably fresh install)